Augustus f



(No Model.) A. P. LETSON.

AUTOMATIC FIRE EXTINGUISHER.)

atented Feb 15 1887..

Witnesses. IBVGB'GOTQ L MAL film- 15 powder PATENT @rnrcn.

inons'rns Lsrson, on BUFFALO, NEW YORK, ASSIGNOR, BY MESNE ASSIGNMENTS, ro FRANK ALTON FOX. or sAME rLAon.

.LiTOMAT-l0 FIRE-EXTINGUISHER.

o. citi of the United States, residing in Buf-' in. ml the county oi Eric and State of New York, 21 invented certain new and useful Imprc. cant .1138 in Automatic Fire-Extinguishers,o'f liich the following is a specification.

Tuc ociectof in inveution'is toproduce a e lirecxtingnisher adapted to act nuoslly when thrown into a. fire; and it a strong glass vessel for holding a liq-ii alkaline solution and athin Viol-shaped vcssci having it boil-shaped mouth for holding csuiinbie acid salt, also a small charge of gunsepcrotcd from the acid salt by means of cotton or other similar substance, together with 3. use protected from. the aciisolt by o other suitable material, and a. packg to prevent the cement used. for sealwi role together from dropping into the 1.. 2 during the operation of scaling, n.- oi' Wii n will. be fully and clearly hereinoiter shown, oescribed, and claimed by refer- ,ecompzmying drawings, in Which-- 3% u in 1% is a. side elevation, a. portion being b oken so as to show a part of the interior of the vial For holding; tho acid salt, powder, fuse S'P muf'nlso for showing the manner of oi the via and the whole together. Fig.

3 is a detached per. motive view of the this glass vial for holding the acid salt, ex-- ilofve material, 8.30.; and Fig. 4 represents a tlClf o! the nlustic Piiiiiiil'lg before being gs, 1 rogues-outs the glass vesthe alkaline solution. It is provided with neck, 2, for holding the :rortoining Zizfifilliii, explosive material, packing.

. represent-s the vial for holding the acid. rides with s. Goring mouth, 4,50 that for s aling it may be easily poured n hot or in a molten state. Into iol placed first a suitable acid, not in firm, but in the town of dry cryso as. not o injure the powder or other I have found that oxalic 3 is a top VlGW of the device.

ajIEICA'lION forming part of Letters Patent Noii iidmd February 15,1887. Application filed December 9, 1385. Serial No. 185.114. (No model.) I.

the vial 3 portly full of oxalic acid, 5, (see Fig. 3,) and thou a layer of cotton or other similar material, 6. Upon this layer of cotton 1 place a small charge of gunpowder, 7, and then insort a fuse, 8, into the powder, and a layer of cotton, 9, or other similar packing material to prevent the cement when poured in to seal it from getting to the powder. I have found common sealing-wax to answer a good purpose.

The'fuse is covcreifi with paper, 10, as for as it enters the glass-case l and the vial as a protection while scaling it.

A packing-ring, 11, of some suitable ma.- terial, (rubber, for instance) is placed on the glass vial before entering it into the glass vessel 1; Thisring acts as it packing and forms a. tight joint, so that when the cement 12 (see Fig. 1) is poured in it will prevent it from running through into the liquid alkaline solution 13. x

The sealing of the vial in place and the mouth of vessel 1, which is provided with a groove, 14, so as to hold the cement firmly, as shown in Fig. 1, completes the device ready for use.

he charge or" gunpowder 7, it will be no ticed, is not large enough to burst the glass not-tom of the vessel. fl. that it is broken into fragments, and the acid crystals are scattered through the alkaline solution, thereby genes sting a large quantity oi carbonic'ocid gas, thereby instantly bursting the vessel l and libcrating the gas onto the tire and. putting it out. By this means a much larger quantity of no.1 bouio-acid gas is liberated in a. given time than could ho when the acid and alkali arr both in the liquid form.

I claim as my invcntion- 1. An automatic fire-extinguisher consisting of a glass vessel for holding an alkaline solution, a thin gloss vessel having a charge 01' acid in tho crystallized form, a sin-.ill chnrge explosive material having a portion of pocking material on each side to'separate it from the acid and cement, and a fuse communicating with the explosive material, the whole be-' ing securely connected together, substantially as and for the purposes described.

2. In an automatic fireextinguisher, the combination of an outer shell, 1, for holding the alkaline solution, and an acid and. explosive material vessel, 3, having a fuse, and a packing-ring, ll, afiapteii to prevent the (242- K0 meeting material from getting into the,v outer shell while filling the neck 2 with cement, and securing the whole together.

JENN'IE M. CALDWEU, JA ES SANGSTER. v 

